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Location monitoring and transmitting device, method, and computer program product using a simplex satellite transmitter

  • US 7,337,061 B2
  • Filed: 02/24/2005
  • Issued: 02/26/2008
  • Est. Priority Date: 09/08/2003
  • Status: Active Grant
First Claim
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1. A monitoring device configured to monitor a remote status of mobile assets, comprising:

  • a position location unit configured to determine a location of a remote device;

    a simplex satellite transmitter configured to transmit the location to one or more satellites in low earth orbit;

    a power source;

    a controller including a state detection unit configured to detect a change of state; and

    a power management unit configured to control a power state of the position location unit and the simplex satellite transmitter, and to periodically enable and disable power from the power source to the position location unit and the simplex satellite transmitter, whereinthe power management unit is further configured to disable power and then enable power on a first interval schedule,the controller is further configured to control the position location unit to determine the location and to control the simplex satellite transmitter to transmit the location on the first interval schedule, andthe controller, upon detection of state change by the state detection unit, is configured to disable power and then to enable power on a second interval schedule.

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